Definition of reasonable adjective from the Oxford Advanced Learner's Dictionary

      

    reasonable

     adjective
    adjective
    BrE BrE//ˈriːznəbl//
     
    ; NAmE NAmE//ˈriːznəbl//
     
     
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  1. 1  reasonable (to do something) fair, practical and sensible It is reasonable to assume that he knew beforehand that this would happen. Be reasonable! We can't work late every night. Any reasonable person would have done exactly as you did. The prosecution has to prove beyond reasonable doubt that he is guilty of murder. We have reasonable grounds for believing that you are responsible. You must take all reasonable steps to ensure that the information that you provide is correct. It seems a perfectly reasonable request to make. opposite unreasonable
  2. 2  acceptable and appropriate in a particular situation He made us a reasonable offer for the car. You must submit your claim within a reasonable time.
  3. 3  (of prices) not too expensive synonym fair We sell good quality food at reasonable prices. Synonymscheapcompetitive budget affordable reasonable inexpensiveThese words all describe a product or service that costs little money or less money than you expected.cheap costing little money or less money than you expected; charging low prices. Cheap can also be used in a disapproving way to suggest that something is poor quality as well as low in price:a bottle of cheap perfume.competitive (of prices, goods or services) as cheap as or cheaper than those offered by other companies; able to offer goods or services at competitive prices.budget [only before noun] (used especially in advertising) cheap because it offers only a basic level of service.affordable cheap enough for most people to afford.reasonable (of prices) not too expensive.inexpensive (rather formal) cheap. Inexpensive is often used to mean that something is good value for its price. It is sometimes used instead of cheap, because cheap can suggest that something is poor quality.Patterns cheap/​competitive/​budget/​affordable/​reasonable prices/​fares/​rates cheap/​competitive/​budget/​affordable/​inexpensive products/​services
  4. 4  [usually before noun] fairly good, but not very good synonym average a reasonable standard of living The hotel was reasonable, I suppose (= but not excellent). There's a reasonable chance that he'll come.
  5. Word Origin Middle English: from Old French raisonable, suggested by Latin rationabilis ‘rational’, from ratio, from the verb reri ‘consider’.Extra examples If companies expect work during personal time, it’s only reasonable to allow personal time at work. The police apparently thought this explanation perfectly reasonable. Be reasonable! We can’t work late every night. If the price is reasonable, we’ll buy it. It is reasonable to assume that she knew beforehand that this would happen. Most people here have a reasonable standard of living. The furniture is in reasonable condition. The hotel was reasonable, I suppose. to prove something beyond a reasonable doubt
See the Oxford Advanced American Dictionary entry: reasonable